Measurement of the W mass by direct reconstruction in e+e- collisions at 172 GeV

被引：22

作者：

Barate, R ^{[1
]}

Buskulic, D

Decamp, D

Ghez, P

Goy, C

Jezequel, S

Lees, JP

Lucotte, A

Minard, MN

Nief, JY

Pietrzyk, B

Boix, G

Casado, MP

Chmeissani, M

Crespo, JM

Delfino, M

Fernandez, E

Fernandez-Bosman, M

Garrido, L

Grauges, E

Juste, A

Martinez, M

Merino, G

Miquel, R

Mir, LM

Morawitz, P

Park, IC

Pascual, A

Perlas, JA

Riu, I

Sanchez, F

Colaleo, A

Creanza, D

de Palma, M

Gelao, G

Iaselli, G

Maggi, G

Maggi, M

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, G

Huang, X

Lin, J

Ouyang, Q

机构：

[1] CNRS, IN2P3, Phys Particules Lab, LAPP, F-74019 Annecy Le Vieux, France

[2] Univ Autonoma Barcelona, Inst Fis Altes Energies, Bellaterra 08193, Barcelona, Spain

[3] Ist Nazl Fis Nucl, Dipartimento Fis, I-70126 Bari, Italy

[4] Acad Sinica, Inst High Energy Phys, Beijing, Peoples R China

[5] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[6] Univ Blaise Pascal, IN2P3, CNRS, Phys Corpusculaire Lab, F-63177 Clermont Ferrand, France

[7] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[8] NRCD, Athens, Greece

[9] Ecole Polytech, Lab Phys Nucl & Hautes Energies, IN2P3, CNRS, F-91128 Palaiseau, France

[10] Univ Florence, Dipartimento Fis, INFN, I-50125 Florence, Italy

[11] Florida State Univ, Supercomp Computat Res Inst, Tallahassee, FL 32306 USA

[12] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[13] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[14] Heidelberg Univ, Inst Hochenergiephys, D-69120 Heidelberg, Germany

[15] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BZ, England

[16] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[17] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[18] Fac Sci Luminy, Ctr Phys Particules, IN2P3, CNRS, F-13288 Marseille, France

[19] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[20] INFN, I-20133 Milan, Italy

[21] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst Phys, D-80805 Munich, Germany

[22] Univ Paris Sud, IN2P3, CNRS, Lab Accelerateur Lineaire, F-91405 Orsay, France

[23] Univ Pisa, Dipartimento Fis, INFN, I-56010 Pisa, Italy

[24] Scuola Normale Super Pisa, I-56010 Pisa, Italy

[25] Univ London, Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England

[26] CE Saclay, DAPNIA, Serv Phys Particules, CEA, F-91191 Gif Sur Yvette, France

[27] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[28] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England

[29] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany

[30] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[31] Ist Nazl Fis Nucl, I-34127 Trieste, Italy

[32] Univ Washington, Seattle, WA 98195 USA

[33] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[34] Rutherford Appleton Lab, Dept Particle Phys, Didcot OX11 0QX, Oxon, England

[35] Univ Barcelona, Barcelona 08208, Spain

[36] Ist Nazl Fis Nucl, Dipartimento Fis, I-95129 Catania, Italy

[37] Univ Turin, Ist Fis Gen, Turin, Italy

[38] CNR, Ist Cosmogeofis, I-10133 Turin, Italy

[39] Kangnung Natl Univ, Kangnung, South Korea

来源：

PHYSICS LETTERS B | 1998年 / 422卷 / 1-4期

关键词：

D O I：

10.1016/S0370-2693(98)00062-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 10.65 pb(-1) collected with the ALEPH detector at a mean centre-of-mass energy of 172.09 GeV. The invariant mass distribution of simulated events are fitted to the experimental; distributions and the following W masses are obtained: WW --> <q(q)over bar><q(q)over bar>, m(W) = 81.30 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> l nu<q(q)over bar> (l=e,mu), m(W) = 80.54 +/- 0.47(stat.) +/- 0.11(syst.)GeV/c(2), WW --> tau nu<q(q)over tilde>, m(W) = 79.56 +/- 1.08(stat.) +/- 0.23(syst.) GeV/c(2). The statistical errors are the expected errors for Monte Carlo samples of the same integrated luminosity as the data. The combination of these three measurements gives: m(W) = 80.80 +/- 0.32(stat.) +/- 0.11(syst.) +/- 0.03(LEP energy) GeV/c(2). (C) 1998 Elsevier Science B.V.

引用

页码：384 / 398

页数：15

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